International Spy Museum, Washington DC

Channel your inner James Bond and head to the first-ever espionage museum to see how information has been obtained spy-style throughout history. You'll have to pay a hefty entrance fee ($18 for adults, $15 for children) for the privilege, but it's worth it to explore the largest collection of international spy artifacts on public display. Way up there on the cool scale are the camera-harnesses used to put on pigeons during WWI to take pictures of enemy positions, and the cigar pistol—a single shot .22 caliber that doubles as a stogie.